(aws-ecs-patterns): ApplicationLoadBalancedFargateService - Add AAAA DNS record for IPV6 Support

Include AAAA DNS record in Route53

### Use Case

We have government customers that are requiring IPV6 functionality from our services. The ALB fully qualified host names being referenced by A records already have 'dualstack' in them, which indicates an intent to support IPV6, but the AAAA record to publish the actual IPV6 address is not created by this CDK construct.

### Proposed Solution
Add a configuration option that results in the creation of both A and AAAA records.

```
record_type: ApplicationLoadBalancedServiceRecordType.ALIAS_IPV4_IPV6
```

* [ ] :wave: I may be able to implement this feature request
* [ ] :warning: This feature might incur a breaking change

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This is a :rocket: Feature Request

Start at the ApplicationLoadBalancedFargateService construct and the ApplicationLoadBalancedServiceRecordType definition. Trace how the existing A record is configured, then add the requested option so both A and AAAA records are created, with coverage for the new behavior before considering it done.

Written by the indexing model from the issue text.